--- configure.orig	2011-12-15 15:01:05.000000000 +0100
+++ configure	2012-01-28 17:33:54.674887100 +0100
@@ -3107,7 +3107,7 @@
 echores "$_kstat"
 
 
-for func in cbrtf exp2 exp2f llrint llrintf log2 log2f lrint lrintf round roundf trunc truncf; do
+for func in cbrtf exp2 exp2f llrint llrintf lrint lrintf round roundf trunc truncf; do
 echocheck $func
 eval _$func=no
 statement_check math.h "${func}(2.0)" -D_ISOC99_SOURCE && eval _$func=yes
@@ -3119,7 +3119,9 @@
   echores no
 fi
 done
-
+for func in log2 log2f; do
+  eval def_$func="\"#define HAVE_$(echo $func | tr '[a-z]' '[A-Z]') 0\""
+done
 
 echocheck "mkstemp"
 _mkstemp=no
